Remove argument from use_hook closure (#496)

Also; update docs for said function

packages/fermi/src/hooks/atom_ref.rs

@@ -16,7 +16,7 @@ use std::{
 pub fn use_atom_ref<T: 'static>(cx: &ScopeState, atom: AtomRef<T>) -> &UseAtomRef<T> {
     let root = use_atom_root(cx);
 
-    &cx.use_hook(|_| {
+    &cx.use_hook(|| {
         root.initialize(atom);
         (
             UseAtomRef {

packages/fermi/src/hooks/atom_root.rs

@@ -4,7 +4,7 @@ use std::rc::Rc;
 
 // Returns the atom root, initiaizing it at the root of the app if it does not exist.
 pub fn use_atom_root(cx: &ScopeState) -> &Rc<AtomRoot> {
-    cx.use_hook(|_| match cx.consume_context::<Rc<AtomRoot>>() {
+    cx.use_hook(|| match cx.consume_context::<Rc<AtomRoot>>() {
         Some(root) => root,
         None => cx.provide_root_context(Rc::new(AtomRoot::new(cx.schedule_update_any()))),
     })

packages/fermi/src/hooks/init_atom_root.rs

@@ -4,7 +4,7 @@ use std::rc::Rc;
 
 // Initializes the atom root and retuns it;
 pub fn use_init_atom_root(cx: &ScopeState) -> &Rc<AtomRoot> {
-    cx.use_hook(|_| match cx.consume_context::<Rc<AtomRoot>>() {
+    cx.use_hook(|| match cx.consume_context::<Rc<AtomRoot>>() {
         Some(ctx) => ctx,
         None => cx.provide_context(Rc::new(AtomRoot::new(cx.schedule_update_any()))),
     })

packages/fermi/src/hooks/read.rs

@@ -22,7 +22,7 @@ pub fn use_read_rc<V: 'static>(cx: &ScopeState, f: impl Readable<V>) -> &Rc<V> {
         }
     }
 
-    let inner = cx.use_hook(|_| UseReadInner {
+    let inner = cx.use_hook(|| UseReadInner {
         value: None,
         root: root.clone(),
         scope_id: cx.scope_id(),

packages/fermi/src/hooks/set.rs

@@ -4,7 +4,7 @@ use std::rc::Rc;
 
 pub fn use_set<T: 'static>(cx: &ScopeState, f: impl Writable<T>) -> &Rc<dyn Fn(T)> {
     let root = use_atom_root(cx);
-    cx.use_hook(|_| {
+    cx.use_hook(|| {
         let id = f.unique_id();
         let root = root.clone();
         root.initialize(f);

packages/fermi/src/hooks/state.rs

@@ -33,7 +33,7 @@ use std::{
 pub fn use_atom_state<T: 'static>(cx: &ScopeState, f: impl Writable<T>) -> &AtomState<T> {
     let root = crate::use_atom_root(cx);
 
-    let inner = cx.use_hook(|_| AtomState {
+    let inner = cx.use_hook(|| AtomState {
         value: None,
         root: root.clone(),
         scope_id: cx.scope_id(),